Chef knife



FIG. 1 is a top, side perspective view of a chef knife in accordance with the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof,

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines shown in the drawing depict portions of the chef knife that form no part of the claimed design. 

CLAIM The ornamental design for a chef knife, as shown and described. 